51501120 has 112 divisors (see below), whose sum is σ = 178417728. Its totient is φ = 12482560.

The previous prime is 51501103. The next prime is 51501139. The reversal of 51501120 is 2110515.

It is a super-2 number, since 2×51501120² = 5304730722508800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 51501120.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8122 + ... + 12998.

Almost surely, 2^51501120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51501120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89208864).

51501120 is an abundant number, since it is smaller than the sum of its proper divisors (126916608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51501120 is a wasteful number, since it uses less digits than its factorization.

51501120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4908 (or 4898 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 51501120 is about 7176.4280808770. The cubic root of 51501120 is about 372.0536400856.

Adding to 51501120 its reverse (2110515), we get a palindrome (53611635).

The spelling of 51501120 in words is "fifty-one million, five hundred one thousand, one hundred twenty".